FR2306591A1 - DIRECTIVITY INCREASE SYSTEM FOR QUADRIPHONE DECODERS - Google Patents
DIRECTIVITY INCREASE SYSTEM FOR QUADRIPHONE DECODERSInfo
- Publication number
- FR2306591A1 FR2306591A1 FR7510144A FR7510144A FR2306591A1 FR 2306591 A1 FR2306591 A1 FR 2306591A1 FR 7510144 A FR7510144 A FR 7510144A FR 7510144 A FR7510144 A FR 7510144A FR 2306591 A1 FR2306591 A1 FR 2306591A1
- Authority
- FR
- France
- Prior art keywords
- quadriphone
- decoders
- increase system
- directivity
- directivity increase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Otolaryngology (AREA)
- General Health & Medical Sciences (AREA)
- Algebra (AREA)
- Health & Medical Sciences (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Stereophonic System (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13047/74A GB1514162A (en) | 1974-03-25 | 1974-03-25 | Directional enhancement system for quadraphonic decoders |
US05/472,291 US3944735A (en) | 1974-03-25 | 1974-05-22 | Directional enhancement system for quadraphonic decoders |
DE19752512907 DE2512907A1 (en) | 1974-03-25 | 1975-03-24 | METHOD AND EQUIPMENT FOR INCREASING THE DIRECTIONAL INFORMATION CONTENT OF SIGNALS |
CA222,932A CA1025365A (en) | 1974-03-25 | 1975-03-24 | Directional enhancement system for quadraphonic decoders |
AU79485/75A AU496615B2 (en) | 1975-03-25 | Signal enhancement system | |
NL7503603A NL7503603A (en) | 1974-03-25 | 1975-03-25 | GUIDELINES FOR QUADRAPHONIC DECODEURS. |
FR7510144A FR2306591A1 (en) | 1974-03-25 | 1975-04-01 | DIRECTIVITY INCREASE SYSTEM FOR QUADRIPHONE DECODERS |
JP50049239A JPS6053520B2 (en) | 1974-03-25 | 1975-04-24 | Directional information enhancement device for 4-channel stereo decoder |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB13047/74A GB1514162A (en) | 1974-03-25 | 1974-03-25 | Directional enhancement system for quadraphonic decoders |
US05/472,291 US3944735A (en) | 1974-03-25 | 1974-05-22 | Directional enhancement system for quadraphonic decoders |
CA222,932A CA1025365A (en) | 1974-03-25 | 1975-03-24 | Directional enhancement system for quadraphonic decoders |
AU79485/75A AU496615B2 (en) | 1975-03-25 | Signal enhancement system | |
FR7510144A FR2306591A1 (en) | 1974-03-25 | 1975-04-01 | DIRECTIVITY INCREASE SYSTEM FOR QUADRIPHONE DECODERS |
JP50049239A JPS6053520B2 (en) | 1974-03-25 | 1975-04-24 | Directional information enhancement device for 4-channel stereo decoder |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2306591A1 true FR2306591A1 (en) | 1976-10-29 |
FR2306591B3 FR2306591B3 (en) | 1977-12-09 |
Family
ID=32074786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7510144A Granted FR2306591A1 (en) | 1974-03-25 | 1975-04-01 | DIRECTIVITY INCREASE SYSTEM FOR QUADRIPHONE DECODERS |
Country Status (7)
Country | Link |
---|---|
US (1) | US3944735A (en) |
JP (1) | JPS6053520B2 (en) |
CA (1) | CA1025365A (en) |
DE (1) | DE2512907A1 (en) |
FR (1) | FR2306591A1 (en) |
GB (1) | GB1514162A (en) |
NL (1) | NL7503603A (en) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4018992A (en) * | 1975-09-25 | 1977-04-19 | Clifford H. Moulton | Decoder for quadraphonic playback |
US4251688A (en) * | 1979-01-15 | 1981-02-17 | Ana Maria Furner | Audio-digital processing system for demultiplexing stereophonic/quadriphonic input audio signals into 4-to-72 output audio signals |
US4532647A (en) * | 1981-08-19 | 1985-07-30 | John C. Bogue | Automatic dimension control for a directional enhancement system |
US4525855A (en) * | 1981-08-27 | 1985-06-25 | John C. Bogue | Variable rate and variable limit dimension controls for a directional enhancement system |
GB8402682D0 (en) * | 1984-02-01 | 1984-03-07 | Audim Sa | Stereophonic sound system |
US4589129A (en) * | 1984-02-21 | 1986-05-13 | Kintek, Inc. | Signal decoding system |
US4615043A (en) * | 1984-12-24 | 1986-09-30 | Don Latshaw | Triphonic sound system |
US4704728A (en) * | 1984-12-31 | 1987-11-03 | Peter Scheiber | Signal re-distribution, decoding and processing in accordance with amplitude, phase, and other characteristics |
US5046098A (en) * | 1985-03-07 | 1991-09-03 | Dolby Laboratories Licensing Corporation | Variable matrix decoder with three output channels |
US4799260A (en) * | 1985-03-07 | 1989-01-17 | Dolby Laboratories Licensing Corporation | Variable matrix decoder |
US4862502A (en) * | 1988-01-06 | 1989-08-29 | Lexicon, Inc. | Sound reproduction |
US5666424A (en) * | 1990-06-08 | 1997-09-09 | Harman International Industries, Inc. | Six-axis surround sound processor with automatic balancing and calibration |
US5172415A (en) * | 1990-06-08 | 1992-12-15 | Fosgate James W | Surround processor |
US5504819A (en) * | 1990-06-08 | 1996-04-02 | Harman International Industries, Inc. | Surround sound processor with improved control voltage generator |
US5339363A (en) * | 1990-06-08 | 1994-08-16 | Fosgate James W | Apparatus for enhancing monophonic audio signals using phase shifters |
US5295189A (en) * | 1990-06-08 | 1994-03-15 | Fosgate James W | Control voltage generator for surround sound processor |
US5136650A (en) * | 1991-01-09 | 1992-08-04 | Lexicon, Inc. | Sound reproduction |
US5365219A (en) * | 1992-07-08 | 1994-11-15 | Michael Hung Chang | Conversation level warning device |
US5291557A (en) * | 1992-10-13 | 1994-03-01 | Dolby Laboratories Licensing Corporation | Adaptive rematrixing of matrixed audio signals |
DE29509157U1 (en) * | 1995-06-02 | 1995-09-21 | Clausonet, Rudolf, 55442 Daxweiler | Device for generating surround sound from stereo signals from sound sources |
US5642423A (en) * | 1995-11-22 | 1997-06-24 | Sony Corporation | Digital surround sound processor |
US5727068A (en) * | 1996-03-01 | 1998-03-10 | Cinema Group, Ltd. | Matrix decoding method and apparatus |
US5796844A (en) * | 1996-07-19 | 1998-08-18 | Lexicon | Multichannel active matrix sound reproduction with maximum lateral separation |
US5870480A (en) * | 1996-07-19 | 1999-02-09 | Lexicon | Multichannel active matrix encoder and decoder with maximum lateral separation |
US7085387B1 (en) | 1996-11-20 | 2006-08-01 | Metcalf Randall B | Sound system and method for capturing and reproducing sounds originating from a plurality of sound sources |
US6005948A (en) * | 1997-03-21 | 1999-12-21 | Sony Corporation | Audio channel mixing |
SE521465C2 (en) | 1999-06-07 | 2003-11-04 | Ericsson Telefon Ab L M | Mobile phone with speech recognition system containing a spectral distance calculator. |
US6239348B1 (en) * | 1999-09-10 | 2001-05-29 | Randall B. Metcalf | Sound system and method for creating a sound event based on a modeled sound field |
US7003467B1 (en) * | 2000-10-06 | 2006-02-21 | Digital Theater Systems, Inc. | Method of decoding two-channel matrix encoded audio to reconstruct multichannel audio |
US20040131192A1 (en) * | 2002-09-30 | 2004-07-08 | Metcalf Randall B. | System and method for integral transference of acoustical events |
US7636448B2 (en) * | 2004-10-28 | 2009-12-22 | Verax Technologies, Inc. | System and method for generating sound events |
WO2006091540A2 (en) * | 2005-02-22 | 2006-08-31 | Verax Technologies Inc. | System and method for formatting multimode sound content and metadata |
US20100223552A1 (en) * | 2009-03-02 | 2010-09-02 | Metcalf Randall B | Playback Device For Generating Sound Events |
GB2502618A (en) * | 2012-06-01 | 2013-12-04 | British Sky Broadcasting Ltd | Surround Sound Speaker System with Wireless Rear Speakers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3812295A (en) * | 1970-10-19 | 1974-05-21 | Columbia Broadcasting Syst Inc | Quadraphonic reproducing system with gain riding logic |
US3821471A (en) * | 1971-03-15 | 1974-06-28 | Cbs Inc | Apparatus for reproducing quadraphonic sound |
US3798373A (en) * | 1971-06-23 | 1974-03-19 | Columbia Broadcasting Syst Inc | Apparatus for reproducing quadraphonic sound |
JPS5213082B1 (en) * | 1971-07-19 | 1977-04-12 | ||
US3794781A (en) * | 1971-09-01 | 1974-02-26 | Columbia Broadcasting Syst Inc | Four channel decoder with improved gain control |
GB1402320A (en) * | 1971-10-25 | 1975-08-06 | Sansui Electric Co | Decoder for use in 4-2-4 matrix playback system |
JPS5235282B2 (en) * | 1972-09-09 | 1977-09-08 | ||
US3829615A (en) * | 1972-10-04 | 1974-08-13 | Mitsubishi Electric Corp | Quaternary stereophonic sound reproduction apparatus |
-
1974
- 1974-03-25 GB GB13047/74A patent/GB1514162A/en not_active Expired
- 1974-05-22 US US05/472,291 patent/US3944735A/en not_active Expired - Lifetime
-
1975
- 1975-03-24 DE DE19752512907 patent/DE2512907A1/en not_active Withdrawn
- 1975-03-24 CA CA222,932A patent/CA1025365A/en not_active Expired
- 1975-03-25 NL NL7503603A patent/NL7503603A/en not_active Application Discontinuation
- 1975-04-01 FR FR7510144A patent/FR2306591A1/en active Granted
- 1975-04-24 JP JP50049239A patent/JPS6053520B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3944735A (en) | 1976-03-16 |
GB1514162A (en) | 1978-06-14 |
FR2306591B3 (en) | 1977-12-09 |
NL7503603A (en) | 1975-09-29 |
JPS50153602A (en) | 1975-12-10 |
JPS6053520B2 (en) | 1985-11-26 |
DE2512907A1 (en) | 1975-10-09 |
AU7948575A (en) | 1976-09-30 |
CA1025365A (en) | 1978-01-31 |
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